Refactor Cutout and Image Editing Logic

- Renamed "Base Plane Depth" to "Reference Depth" across validate_cutout.py for consistency.
- Introduced a new specification for Cutout mesh sampling to ensure source pixel spacing is preserved and limits are applied correctly.
- Unified naming conventions for image editing results to maintain consistency across Remove Background, Upscale, and Crop operations.
- Updated the handling of Refine Selection to ensure it retains the original bounds and does not apply unnecessary cropping.
- Enhanced material generation logic to connect image color directly to IOR Level, improving the rendering of dark areas.
- Established clear requirements for geometry depth controls and image result materials to ensure consistent behavior across different components.
- Removed outdated logic and ensured all changes are documented and tested for regression.

docs/internals/architecture.md

@@ -38,7 +38,7 @@ flowchart TD
     Menu --> Runtime["注册 JobRuntime"]
 ```
 
-`__init__.py` 按依赖顺序注册，并在注销时逆序清理。扩展级设置统一由 `preferences.addon_preferences()` 读取；`runtime.py` 只消费 `configured_storage_root` 回调，不持有 Blender 偏好设置的定位逻辑。交互中的临时状态和 Debug 参数保存在 `Scene.anyimage_settings`。`max_ai_input_size` 与 `max_cutout_mesh_resolution` 都在 `preferences.py` 定义与读取：前者由 Operator 冻结到 AI Job 请求，后者在 Blender 侧统一限制所有 Cutout Shape 的网格采样密度。Upscale 还用 AI 输入上限判断当前 Image 是否允许执行。
+`__init__.py` 按依赖顺序注册，并在注销时逆序清理。扩展级设置统一由 `preferences.addon_preferences()` 读取；`runtime.py` 只消费 `configured_storage_root` 回调，不持有 Blender 偏好设置的定位逻辑。交互中的临时状态和 Debug 参数保存在 `Scene.anyimage_settings`。`max_ai_input_size` 与 `max_cutout_mesh_resolution` 都在 `preferences.py` 定义与读取：前者由 Operator 冻结到 AI Job 请求，后者在 Blender 侧统一限制所有 Cutout Shape 实际几何范围的最长采样边。Upscale 还用 AI 输入上限判断当前 Image 是否允许执行。
 
 ## 同步与异步路径